Decomposing farmyard manure: After the farmyard manure has not passed through, there are pathogens and eggs. After the application, the disease is spread; if the manure is put into the greenhouse and then decomposed, it will cause burning seedlings.
Nitrogen topdressing multiple times: This method can prevent the damage of ammonia to vegetables and the secondary soil salinization and nitrate accumulation.
Appropriate amount of micronutrients: The demand for trace element fertilizers on vegetables is small, but the role in the metabolism of vegetables is great. Frequently used fertilizers include boron, molybdenum, zinc, and iron fertilizers. Micro-fertilizer is used as base fertilizer and can also be used for seed dressing, soaking or top dressing. The amount of micro-fertilizer must be accurate to avoid causing fertilizer damage.
Adding carbon dioxide: The following methods can be used to increase the carbon dioxide gas fertilizer: 1 The carbon dioxide generator method moves along the studio to a carbon dioxide generator, such as a plastic bucket, at a height of more than 7 meters. 0.5 meters, the barrel first loaded with 1 kilogram of dilute sulfuric acid (concentrated sulfuric acid and water ratio of 1:3), every day after sunrise about 1 hour plus 80 grams of ammonium bicarbonate in the barrel can be added for 5 days. Its by-product ammonium sulfate can be used as a fertilizer, which is economical and convenient. 2 Liquid Carbon Dioxide Release Method Carbon dioxide is loaded into a cylinder and a plastic tube with a diameter of 1 cm is used to open it into a plastic greenhouse. Because the proportion of carbon dioxide is larger than air, the plastic pipe must be off the ground, and a small hole is made in the plastic pipe every 2 meters. Then, the plastic pipe is connected to the cylinder outlet, and the outlet pressure is kept at 1 to 1.2 kg/cubic. Centimeter, deflate 8 to 10 minutes per day depending on the situation. 3 The combustion method sets up multiple points in the shed to ignite biogas, liquefied gas, organic fuel, etc., and releases carbon dioxide through combustion.
Spraying rice vinegar to increase production: It can accelerate vegetable chlorophyll synthesis, increase the ability to absorb nutrients, and promote fruit enlargement. General leafy vegetables from the Dingmiao to harvest spray 4 to 5 times, cucumbers, tomatoes before flowering and fruiting spray 3 to 4 times, each time about 10 days, with 300 times the liquid is appropriate.
Spreading plant ash: sheds often throw hay ash, which can prevent the occurrence of damping-off diseases, blight and other diseases.
Application of growth regulators: The correct use of plant growth hormone can promote plant growth and prevent flowering. Such as eggplant vegetables in the low temperature conditions, although flowering, but the low fruit setting rate, such as ethephon, 2,4-D, anti-escaped, etc., can effectively prevent the fruit of Solanaceous vegetables.
Change the floor vents: Improve the opening of the floor to open the ventilation of the roof, to prevent the vegetables from entering cold air and suffer damage.
Strengthen prevention and control of pests and diseases: once the disease occurs in greenhouses, ecological control should be adopted to control the temperature and humidity in the greenhouses, create an unfavorable environment where pests and diseases occur, and regularly fight against drugs; at the same time, we must pay more attention to chemical control. Comprehensive application of physical and biological control methods to avoid residual pesticides.
Promote the new method of application of pesticides: In the process of chemical control, scientific drugs should be used, the right medicine should be prescribed, and the use of aerosols and dust agents should be emphasized while the use of wettable powders should be controlled, and the control effect and ergonomics should be improved. In particular, the dust method is highly efficient and labor-saving, and it is 20 times more efficient than the conventional spray method. It can save 50% of the drug. Compared with the dust method and spray method for controlling cucumber downy mildew, the control effect is increased by 30% to 50%.
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